VLANs

Question 1

Default VLAN number?

Answer 1

1

Question 2

Cisco built-in VLAN numbers?

Answer 2

• 1
• 1002
• 1003
• 1004
• 1005

Question 3

Access Port Config steps?

Answer 3

SW1(config)# VLAN 10
SW1(config-vlan)# name Sales VLAN

SW1(config)# interface fast0/1
SW1(config-if)# switchport mode access
SW1(config-if)# switchport access vlan 10
SW1(config)# interface fast0/2 - 7
SW1(config-if)# switchport mode access
SW1(config-if)# switchport access vlan 10

Question 4

Trunk Port Config steps?

Answer 4

SW1(config)# interface fast0/24
SW1(config-if)# description trunk to SW2
SW1(config-if)# switchport trunk encapsulation dot1q
SW1(config-if)# switchport mode trunk
SW1(config-if)# switchport trunk native vlan 999
SW1(config-if)# switchport trunk allowed vlan 10, 20, 30

Question 5

Command to: Show list of VLANs on the switch

Answer 5

SW1# show vlan brief

Question 6

Command to: Show list of VLANs on an interface

Answer 6

SW1# show interface fast 0/1 switchport

Question 7

What does DTP stand for?
What does it do?

Answer 7

Dynamic Trunking Protocol
Allows for two switches to negotiate a trunk port between the two switches

Question 8

DTP config options on switchports:

(3 options)

Answer 8

1. SW1(config-if)# Switchport mode dynamic auto - will form a trunk if the other side of the link is set to trunk or desirable
2. SW1(config-if)# Switchport mode dynamic desirable - will form a trunk if the other side of the link is set to trunk or desirable, or auto
3. SW1(config-if)# Switchport negotiate - Disables DTP

Question 9

What does VTP stand for?
What does it do?

Answer 9

VLAN Trunking Protocol (it’s not actually a protocol)
Pushes VLANs created from VTP server devices to VTP client devices.

Question 10

VTP Modes:

(3 modes)

Answer 10

1. VTP Server - You can add, edit, or delete VLANs. Server will sync it’s vlan database from another server with a highest revisiton number
2. VTP Client - Cannot add, edit or delete VLANs. Will sync it’s VLAN database from the server with the highest revison number
3. VTP Transparent - Does not partisapate in the VTP group but will pass VTP packets from other swithes. You can add, edit, and delete VLANs but they will not be synced with any other devices.

Question 11

VTP Config Steps:

Answer 11

SW1(config)# vtp domain Presto (or some other name)

SW1(config)# vtp mode server
or
SW1(config)# vtp mode client
or
SW1(config)# vtp mode transparent

Question 12

View VTP config command?

Answer 12

SW1# show vtp status

Question 13

VLAN Version 1 supports which VLANS?
VLAN Version 2 supports which VLANS?
VLAN Version 3 supports which VLANS?

Answer 13

1. VTP Version 1 : VLANs 2 -> 1001
2. VTP Version 2: VLANs 2 -> 1001
3. VTP Version 3: VLANs 2 -> 1001, 1006-4094

Question 14

SVI (Switched Virtual Interface) config steps:

Answer 14

SW1# config t
SW1(config)# ip routing
SW1(config)# interface vlan 10
SW1(config-if)# ip address 192.168.10.1 255.255.255.0
SW1(config)# interface vlan 20
SW1(config-if)# ip address 192.168.20.1 255.255.255.0